920645307 has 12 divisors (see below), whose sum is σ = 1332259240. Its totient is φ = 612638208.

The previous prime is 920645303. The next prime is 920645309. The reversal of 920645307 is 703546029.

920645307 is a `hidden beast` number, since 9 + 2 + 0 + 645 + 3 + 0 + 7 = 666.

It is not a de Polignac number, because 920645307 - 2² = 920645303 is a prime.

It is a super-2 number, since 2×920645307² = 1695175562602248498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920645303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88582 + ... + 98427.

Almost surely, 2^920645307 is an apocalyptic number.

920645307 is a deficient number, since it is larger than the sum of its proper divisors (411613933).

920645307 is a wasteful number, since it uses less digits than its factorization.

920645307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187562 (or 187559 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 920645307 is about 30342.1374823858. The cubic root of 920645307 is about 972.8161710353.

The spelling of 920645307 in words is "nine hundred twenty million, six hundred forty-five thousand, three hundred seven".